Apparatus for cooling and cleansing blast-furnace gases.



No. 690,795. v Patented Jan. 7, I902;

. B. H; THWAITE. 1 I APPAR-ATUS FOR COOLING AND fiLEANSING BLAST FURNACEGASES.

(Appiication filed Sept.' 12, 1901.

(No Model.)

' UNITED STATES PATENT OFFICE.

BENJAMIN H. THWAITE, OF WESTMINSTER, ENGLAND, ASSIGNOR TO THE BLASTFURNACE POWER SYN DIOATE, LIMITED, OF LONDON-AND WVEST- MINSTER,ENGLAND.

APPARATUS-FOR COOLING AND CLEANSING BLAST-FURNACE GASES.

SPECIFICATION forming part of Letters Patent l lo. 690,795, datedJanuary 7, 1902. Application filed September 12, 1901. Serial No.75,220. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN HOWARTH THWAITE, a citizen of England,residing at 29 Great George street, Westminster, in the countyof London,England, have invented a certain new and useful Apparatus for Coolingand Cleansing Blast-Furnace Gases, (for which I have applied for apatent in Great Britain, dated August 1, 1901, No. 15,595,) to of whichthe following is a specification.

My invention relates to apparatus for coolin g and cleansing thecombustible gases which issue from a blast-furnace, so that they may berendered available for operating in an in- I 5 ternal-combustion engine,the apparatus being so designed that the heat abstracted from the gasesis imparted to air to be employed for hot blast or to support thecombustion of producer or other gas burned in stoves for heating theblast.

Figure 1 of the accompanying drawings is a longitudinal section, Fig.2is a transverse section, and Fig. 3 is a sectional plan'on the line 3 3of Fig. 1, of apparatus according to my invention.

Over a trough a, containing water and made with an inclined bottom, sothat deposited mud can be raked out at either side, is supported acasing 1), made in two compartments 3o separated by a horizontalpartition 0. The upper compartment is "also divided into a number ofsubsidiary compartments separated by vertical partitions d. In the lowercompartment there are a number of vertical 3 5 partitions e in line withthe upper partitions d; but the first,- third, and other odd partitionse have large passages-through their upper parts, while the second,fourth, and other even partitions e have large passages through 40 theirlower parts. Through the horizontal partition 0 are rows of holes inwhich are fitted in an air-tight manner tubes f, closed at theirbottoms, which dipinto the water, there being a row of these tubesbetween each pair of the partitions 6. Through each of the upperpartitions dthere are rows of holes fitted in an air-tight manner withbends g of tubes h, which extend down, one in each of the tubes f, tonearly its bottom, it being itself open at the bottom. At one end of thevessel is an inlet is for blast-furnace gases, and

at the other end there is an outlet 1 for them. There is also an inlet 8and an outlett for air; 7 At each side of the vessel are formedlaterally-projecting recesses Z, in each of which 5 5 are accommodated apair of pulleys m and weights a, suspended by chains which pass over thepulleys, the other ends of these chains being attached to scrapers 10,which are metal plates so shaped that they embrace the tubes f and bearagainst the faces of the partitions e. The pulleys m are fixed on shaftsq, driven by chains from gear-wheels 1*, which are caused by anysuitable motor to make a number of turns in the one direction anda'number in the opposite direction alternately.

The apparatus is operated as follows: Blastfurnace gases entering by theinlet, are caused by the partitions e to pass in a zigzag course throughthe vessel in contact with the 70 tubes f to the outlet Z; At the sametime air blown or drawn by a fan or otherwise is caused to enter by theinlet 8, to pass from the first subsidiary compartment down the tubes hof the first row, to ascend the annular. spaces between the tubes f andg to the next upper compartment, and so on through row after row of thetubes to the outlet 25. The blastfurnace gases are thus cooled and theair is heated. Also the gases deposit on the surface the tubes 9 and ofthe partitions a much of the dust carried by them. By the alternatingup-and-down movements of the scrapers 19,, due to the reciprocations ofthe shafts q, the matters deposited on the tubes g and the partitions eare scraped 0% their surfaces and drop into the water below, forming amud, which from time to time can be removed.

Having thus described the nature of this invention and the best means'lknow of cargo ryih g the same into practical efiect, I claim- 1. Anapparatus for cooling and cleansing blast-furnace gases comprising avessel placed over a Water-trough and having a suitable inlet and outletfor the gases, partitions in said 5 casing provided with openings forthe .passage of the gases therethrough, an upper compartment in the saidvessel having a suitable air inlet and outlet and divided intosubsidiary compartments, tubes depending from a tube extending in eachof the said dependalong the surfaces of the said tubes and paring tubes,having an open bottom and contitions, and means for so moving them,subnected at the top to one of the subsidiary stantially as described.

compartments, substantially as and for the In testimony whereof I havehereunto set 5 purposeset forth. my hand in presence of two subscribingwit- 15 2. In combination in an apparatus for cool- I nesses. ing andcleansing blast-furnace gases, verti- B. H. TIHVAITE. cally-extendingtubes and partitions over Witnesses: which the gases are caused to pass,scrapers WALTER E. ROCHE,

10 adapted to be moved alternately up and down HORACE ALLEN.

